Dan's utility function is U(xy) 4.9 x y. Dan's income is 140 dollars, the price of good X is 3 and the price of good Y is 7.5, What is the slope of Dan's income expansion path, dy/dx, on a graph where good X appears on the horizontal axis and good Y appears on the vertical axis. Remember not to enter ratios below, such as 3/4, 2/9 etc. Instead enter the number in decimal form